The delay chip then spits out an analog signal (delayed, of course), and a portion of that signal is sent back into the delay again (this is controlled by the feedback knob).
So, for each pass the signal makes, it gets dirtier and dirtier, due to the repeated conversion process.
Boss released this pedal in 1983, and to say that it caused a stir is an understatement.
Still, the technology involved was quite expensive, so it wasn’t a pedal everyone could afford.
The mode selector was mounted separately from the other three pots (which were soldered together to a small circuit board).This means that if you find a DD-3 that has a wobbly mode selector while the other pots are screwed down tight, it is definitely a version 1 pedal.If you open it up, you will find a huge delay chip that covers the entire width of the circuit board, along with a maze of wires connecting the pots and various points on the pcb. Eventually, Boss decided that the circuit design used in the DD-2 and early DD-3 was too expensive to manufacture – which is understandable, considering the amound of hand-wiring and tiny wires that went into one of those pedals.Somewhere down the line, Boss redesigned the top end of the circuit board to fit the more modern style internal (or pcb-mounted) adapter jack.This change was made while the production was still located in Japan, so the earliest of these pedals will have the blue ”Made in Japan” label.